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发明名称
Improvements in or relating to indicating devices
摘要
申请公布号
GB784521(A)
申请公布日期
1957.10.09
申请号
GB19540028205
申请日期
1954.09.30
申请人
BERNARD HAMPEL
发明人
分类号
G09F3/20
主分类号
G09F3/20
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代理人
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